#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
#include<string>
#include<algorithm>

using namespace std;

const int N = 1e5 + 10;
int a[N],b[N], c[N];
int la, lb, lc;
void mul(int c[], int a[], int b[])
{
	for(int i = 0;i < la; i++)
		for (int j = 0; j < lb; j++)
			c[i + j] += a[i] * b[j];
	for (int i = 0; i < lc; i++)
	{
		c[i + 1] += c[i] / 10;
		c[i] %= 10;
	}
	while (lc > 1 && !c[lc - 1]) lc--;
}
int main()
{
	string x, y; cin >> x >> y;
	la = x.size(), lb = y.size(), lc = la + lb;
	for (int i = 0; i < la; i++) a[la - 1 - i] = x[i] - '0';
	for (int i = 0; i < lb; i++) b[lb - 1 - i] = y[i] - '0';
	mul(c, a, b);
	for (int i = lc - 1; i >= 0; i--) cout << c[i];

	return 0;
}